Gas-heater.



H. K. BOYD.

GAS HEATER.

APPLICATION FILED IuLv I4. |916.

Patented May 29, 1917.

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H. K. BOYD.

GAS HEATER.

1,228,289 APPLICATION FILED 1ULY14, 1916. 29,

2 SHEETS-SHEET 2.

WxTNEssEs ATTORNEY UNITED STATES PATENT OFFICE.

HAMILTON K. BOYD, PITTSBURGH, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TOERNEST H. OI-ILENDORF, OF MIIVIS, FLORIDA.

GAS-HEATER.

To all whom it may concern:

Be it known that I, HAMILTON K. BOYD, a citizen of the United States,residing at 32 .East General Robinson street, Pittsburgh, in the countyof Allegheny and State of Pennsylvania, have invented a new and usefulGas-Heater, of which the followingis a specification.

The present invention relates to an improvement in gas heaters designedto be used to heat cold air and discharge. the

heated air into the same room in which thel heater is located, the roombeing thereby heated by the air as well asrby the heat' directlyradiated from the heater.

It is the object of the present invention to provide among otherfeatures a `heater which is constructed 0f a number of detachablyconnected plates, peculiarly arranged to provide large heat radiatingsurfaces and an air flue to protect the plates, and in which is heated alarge volumeof air; also a heater wherein the flame `will not roar whenthe gas is admitted under full pressure to the burner and which ishighly efficient consuming substantiallyk one-third less fuelthan priorheaters; and which requires practically no attention after the burner islighted. f

Other objects and advantages of'this invention will be brought out inthe follow'- ing specific description of the presentpreferredembodiment, thesaine being illustrated in the accompanying drawings,wherein- Figure 1 is a front elevation of a gas "heater constructedaccordingto'this invention.

Fig. 2 is a vertical transverse section, taken through the same.

Fig. 3 is a top plan view ofthe gas heater, the top being removed.

Fig. l1 is a horizontal section, taken on the line 4--4 of Fig. 2. i

Fig. 5 is a detail perspective view of the upper deflecting plate. t

Fig. 6 is a detailperspective view of the lower deflecting plate.

The heater of this invention is preferably made up of a plurality ofplates or sheets, which are detachably secured together to permit therenewal of the sheets or plates when burnt out, and to permit the readycleansing of the interior of the heater.

Specification of Letters Patent.

Patented May 29, 1917.

Application filed July 14, 1916. Serial No. 109,313.

10 are the side plates, which extend upwardly at the opposite sides vofthe heater, and which are of a width equal to the depth of the heater.The forward and rear edges of the side plates 10 are rolled overinwardly toward each other, to provide locking beads or flanges 11. 12and 13 are up per and lower bottom plates, respectively, which arevertically spaced apart between the lower ends of the side plates 10,and are secured thereto by means of flanges 14 and 15 turned downwardlyfrom the opposite ends of the bottom plates 12 and 13. The upper bottomplate 12 extends rearwardly from the forward edges of the side plates10, and is inclined fupwardly at a slight angle, as shown in Fig. 2.This bottom plate 12 terminates short of the rear edges of the sideplates 10, and'is' rolled upwardly and over at its rear edge toprovide alocking bead 16. The forward edge of the upper bottom plate 12 has adownturned flange 17 adapted to fit against the inner side of a lowerfront plate 18, which extends across the front of the heater atthebottom thereof. The opposite ends of the front plate 18 are Vrolled overfor engagement in the lower ends of the front locking beads 11 of theside plates 10. The upper edge of the front plate 18 is preferably bentinwardly to overlap the forward edge of the upper bottom plate 12, andthe flange 17is suitably secured to the front plate 18.

The lower bottom plate 13 extends from the rear edges of the side plates10, forwardly and downwardly, and terminates short of the forward edgesof the plates 10 to provide, behind the front plate 18, a bottom passageor opening through which air may pass or circulate fromV beneath thestove. The bottom plates l2 and 13 provide a substantiallyvhorizontalair duct or flue A in the bottom of the heater. A back plate 19 has itsopposite edges rolled over for interlocking engagement with the rearlocking beads 11 of the side plates. The back plate 19 extends from thetop to the bottom of the stove, and is preferably provided, near itsupper end, with an outwardly extending nipple 2O to which may beattached a conducting pipe for carrying ofll the products ofcombustionfrom the heater.

A second back or lire plate 21 is arranged in forwardly spaced relationto the back plate 19, and has its lower edge rolled over forinterlocking engagement in the bead 16 of the upper bottom plate 12.This second back plate rises from the rear end of the bottom plate 12,and is inclined forwardly at a slight angle. The back plates 19 and 21provide a vertical air duct or passage B, which is a continuation of thepassage in the bottom of the heater. The second back plate 21 is rolledover at its upper edge to provide a locking bead 22.

rlhe stove is provided with a pair of spaced apart, forwardly andupwardly extending, deflecting plates 23, and 24. The lower deflectingplate 23, shown in detail in F ig. 6, has its lower edge rolled over andinterloclred with the bead 22 of the back plate 21, and comprisessubstantially a continuation of the back plate. rlhe deflecting plate 23has flanges 25 at its opposite ends, which are secured against the innerfaces of the sides 10. The upper forward end of the plate 23 has adepending flange 26, which is secured against the inner side of an upperfront plate 27, the latter having its opposite ends rolled over andinterlocked with the front beads 11 of the side plates. The lowerdeflecting plate 23 has its opposite forward corners cut away to providepassages 28 immediately behind the front plate 27, and at the oppositesides or ends of the heater.

The upper deflecting plate 24, shown in detail in Fig. 5, has anupturned flange 29 on its rear end, which is secured against the backplate 19. The upper deflecting plate 24 has its opposite lateral edgesconverging forwardly, and has, at its forward end, an upturned flange30, which is secured against the rear side of the front plate 27. Theopposite converging edges of the deflecting plate 24 have dependingflanges 31, which extend downwardly to, and rest at their lower edgesupon, the upper face of the lower deflecting plate 23. Outturned flanges32 extend along the lower edges of the flanges 31, and are adapted forsecurement upon the upper face of the lower deflecting plate 23. Theflanges 32 have notches 33, as shown in Figs. 3 and 5, to register withthe passages 28 in the plate 23. lThe lateral flanges 31 lie flatagainst the side plates 10 at the rear end of the deflecting plate 24,and are cut away at their lower edges, to accommodate the locking bead22 of the second back plate 21.

The front plate 27 is provided with an outlet opening D therethrough,which registers with the duct or passage C between the deflecting plates23 and 24, permitting air, rising through the duct, to pass 'outthroughl the front of the heater. A reinforcing plate 34, of anyadaptable design and size, is suitably secured against the front plate27, and has an opening therein which registers with the outlet openingin the front plate.

A 'baffle plate 35, is placed, substantially vertically, in the heatingchamber, formed in the upper end of the shell above the deflector plate24. This baille plate 35 terminates, at its lower end, in spacedrelation from the deflecting plate 24, to provide a passage about thelower end of the baflle plate through which the products of combustionmay pass as they are carriedv to the outlet nipple 20. This baffle plate35 is provided at its opposite ends with flanges 36, secured against theinner faces of the sides 10. A top 37 is fitted over the shell, and hasits marginal edge overturned beneath the top, and projected downwardlyto provide an inwardly o'set flange 38, which eX- tends into the shelland lies against the inner faces of the adjacent plates. As shown, theflange 38 is provided with a plurality of slots 39, which open throughthe lower edge .of the flange, and which are adapted to receive thereinclamping bolts, or the like, to detachably hold the top in position.

The anges of the various plates are preferably held in place by nuts andbolts, so that the plates may be separated when it is desired to renewthem, and to permit the easy assemblage of the parts in setting up theheater. V

A burner tube 40 extends longitudinally through the heater preferablyover the inner end of the upper bottom plate 12. The tube 40 has a rowof gas outlet openings 41 in its upper side, through which the gas mayissue. The upper bottom plate 12is provided with a row of air inletopenings 42, arranged preferably immediately behind the burner tube 40,and at the base of the forward or second back plate 21. Air passes fromthe bottom air duct A up through the openings 42, and promotes thethorough combustion of the gas which issues from the burner tube.

Legs 43, or the like, are detachably secured to the lower corners of theshell, to support it in spaced relation from the floor or ground, andpermit a circulation of the air upwardly through the duct.

when the burner is lighted, the same plays against the back or fireplate 21, and the deflecting plate 23. Air is drawn upwardly through theair duct A leading through the bottom of the shell, upwardly in the ductB between the backs of the shell, and further upwardly and forwardly inthe duct C between the deflecting plates 23 and 24, the air being heatedby contact with the bottom plate 12, the back plate 21, and the upperdeflecting plates 23 and 24. This heated air passes outwardly throughthe opening l) ofthe upper front plate 27 into the room to be heated.The products of combustion are thoroughly burned by the admixture of airtherewith, which passes upwardly throughY the openings 42 behind theburner tube 40. The products o combustion pass upwardlyv against thedeflecting plate 23, are caught behind the `front plate 27and passthrough the passages 28 iplttlilthe heating chamber'at the top of the Se i y The baliie plate'35 traps the products of combustion inthisheating chamber, and thus obtains the benefit of practically all ofthe heatunits forhea'ting the walls of the chamber. The upper detlectingplate24 is,

in this manner, maintained at a high temperature, while 'the heat fromthe combustion chamber heats the bottom plate 12, the back plate 21 andthe lower deflecting plate 23, and the air in the duct is thoroughlyheated in its passage upwardly through the heater. The heat in thecombustion chamber is deflected outwardly, through the open front of theshell, by the plates 12, 21 and 23.

The second back plate 21 may be provided with a layer of asbestos, orthe like, and the sides 10, the bottom l2, and the deflecting plate 23may be covered with a layer of copper, as shown in the drawings. Thebame plate 35 may be provided with openings 44, (Fig. 8) which are outof line with the outlet nipple 20, to provide a circuitous path Jfor theproducts of combustion, and thus prevent the easy low of the sameoutwardly through the shell. By thus trapping thev products ofcombustion the walls of the heating chamber in the top of the shell arethoroughly heated.

1. A gas heater comprising a shell formed of side plates, a top plateand a back plate connected to the top and side plates, an upwardlyinclined deiiecting plate connected to the back plate and the sideplates below the top plate, and a front plate connected to the upper endof the delecting plate thereby forming a heating chamber which is denedby the back, front, top and detlecting plates, said back plate having anopening near the top, a baie plate depending from the top plate andarranged to eX- tend below the opening of the back plate, a second backplate and a second delecting plate each spaced from 'the rst mentionedback plate and deflecting plate to provide an air duct which is open atthe bottom for the ingress of cold air, and a burner arranged in frontof the second mentioned back plate, the deecting plates havingregistering passages formed therein at the top for the products ofcombustion to reach the heating chamber without escaping into the airduct.

2. A gas heater comprising an open front shell composed of side walls, aback wall joining the side walls, a bottom plate inclined downwardlyfrom the back wall and terminating short of the front edges yof the 'airduct in the bottom of the heater, and terminating short of said backwall, a back plate rising from the rear end of the second mentionedbottom plate and spaced from the back plate to provide a continuation ofthe air duct at 'the back of the heater, a second upwardly inclineddelecting plate spaced below the first deflecting plate to providetherewith the upper end of the air duct, a front plate to which the saiddeflecting plates are connected, said front plate having an openinginline with the air duct, and a burner in the combustion chamber, saiddeflecting plates having passages therethrough leading from the top ofthe ombustion chamber to the heating cham- 3. A gas heater having sideplates, a back plate joining the rear edges of the side plates, upperand lower front plates connecting the forward edges of the side plates,spaced apart and overlapping bottom plates of less width than the sideplates and arranged between the side plates and extending one from theback plate and. one from the lower front plate and providingtherebetween an air duct in the bottom of the heater, a second backplate rising from the inner end of the upper bottom plate and in spacedrelation to the first mentioned back plate to provide a verticalcontinuation of the air duct in the back of the heater, a pair oi spacedapart deliector plates inclining upwardly and 'forwardly from the backplates to provide an upper continuation of the air duct, the upper frontplate having an opening in alinement with the upper end of the ductformed between the deflecting plates, and a burner arranged above theupper bottom plate, and close to the second back plate.

4. A gas heater comprising a shell having an' outlet in its back, anopen front combustion chamber arranged within the shell, said shell andsaid combustion chamber having opposed and spaced apart bottom plates,back plates and top defiecting plates to provide van air ducttherethrough extending along the-bottom and about the combustion chamberand opening thereabove through the front of the shell, the upperdetlecting plate forming the bottom of a heating chamber in the top ofthe shell opening through said outlet, both of the de- #lectin-g plateshaving a passage .therethrough ,at the front `connecting the combustionchamber withvthe heating chamber, a burner in .the combustion chamber atthe lower end `thereof and at the rear, the 11pper of said bottom platesbeing provided with a series of openings between sai-id burner and 'theinner one of said back plates whereby air is admitted to said burnerfrom L() said air duet, and means for delecting' the heated yproductsyof combustion along the top .of the upper deeeting plate. y

In testimony, that I claim the lforegoing afs own, I have hereto aflixedmy sign-ature in the presence of two witnesses.

HAMiLTON K. BOYD.A

Witnesses:

JOHN B. MCBRIDE,A R. E. ANDERSON.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Y Washington, D. G.

